Abstract The design of an advanced Miniature Pulse Tube Cooler (MPTC) for long-life space applications is presented. The cooler system incorporates a balanced compressor, with an in-line pulse tube configuration, yet retains the flexibility of a transfer line. The ‘split’ configuration provides obvious advantages for instrument design, while maintaining economical options for drive electronics and maximising potential for vibration isolation between compressor and detector. It also potentially allows the pulse tube end to be separately placed within a pre-cooled enclosure at temperatures beyond the range of operation for typical compressor mechanisms. The system employs an integrated back-to-back compressor for inherent vibration cancellation. The designdraws on RAL compressor experience and uses a modified flexure spring, motor and clearance seal features based on that of the Oxford/RAL heritage coolers, as well as proven methods for alignment and verification of compressor health. The mass of the system has been minimised,with significant mass savings realised in the motor design, with additional challenge presented by the split/in-line configuration. A thorough set of trade-off studies and detailed analyses have been performed to establish the coil, permanent magnet and spring configurations. Baseline design parameters from the CEA/SBT model predictionshave been optimised through testing of various pulse tube geometries, with attention to regenerator and inertance tube dimensions, drive frequency and fill pressure. Sensitivity to these parameters has been studied to
Design and Characterization of a Miniature Pulse Tube Cooler
Cryocoolers 12 ; 173-182
2003-01-01
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Design and Characterization of a Miniature Pulse Tube Cooler
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